HP bh5700 User Manual page 337

semicolon-delimited statements. Each statement specifies an action to take on a stack. A stack is
a group of ports on a single switch fabric chip. Actions include stack creation, stack
port association, stack configuration and stack control.
Stack Creation
stack0: ppa0 local;
stack1: ppa1 local;
Stack Port Association:
After stack creation, the physical ports must be associated with a virtual port name. One might
think of this as mapping the ports from their physical association to a virtual name. The physical
port numbers are usually 0 based, but are dependent on how the ports are physically configured in
the switch fabric silicon and how those ports are labeled at the physical connector. At a
minimum the port association is used to move the ports of a second, third, or more switch silicon
chip to a different virtual port name then the others. In this way, the ports can be built into a
unique linear port list.
Stack port association syntax:
stack<N>: <zre_list> = <zre_list>;
The port association statement begins with the stack and number representing the group of ports
being mapped. The stack must be previously created with a stack creation command. After the
Ethernet Switch Blade User's Guide
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The first step in creating a stack is to define its location. Each stack is assigned a
unique small integer by the user. On the base switch this integer must be a
value from 0 to 31. The location is defined with two values; a Physical Point of
Attachment (ppa) and a network location. The ppa is defined by the keyword
"ppa" followed by an integer value. The integer value is a 0 based contiguous
value representing the physical switch fabric chip as it was discovered by the
Linux operating system. In the case of the base switch there are two chips
directly controlled. The network location specifies an IP address of the CPU that
controls the physical switch fabric chips. If the CPU that is running zstack
controls the physical switch fabric chip, the key word "local" is used in place of
the IP address. Currently only "local" CPU control is supported.
Stack creation example for a base switch:
The above statements indicate that there are two switch fabric chips that are
controlled by the local CPU.
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